Improper input validation in Cisco Prime Access Registrar - CVE-2018-0421
Published: September 5, 2018 / Updated: September 7, 2018
Vulnerability identifier: #VU14697
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2018-0421
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco Prime Access Registrar
Cisco Prime Access Registrar
Detailed vulnerability description
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists in TCP connection management in Cisco Prime Access Registrar due to incorrect handling of incoming TCP SYN packets to specific listening ports. A remote attacker can send a specially crafted stream of TCP SYN packets and cause the application to eventually restart if a file description cannot be obtained.
How to mitigate CVE-2018-0421
The vulnerability has been fixed in the versions 7.3.0.4 and 8.0.1.1.